Application of Differential Colorimetry To Evaluate Anthocyanin-Flavonol-Flavanol Ternary Copigmentation Interactions in Model Solutions

作者：Gordillo Belen; Rodriguez Pulido Francisco J; Lourdes Gonzalez Miret M; Quijada Morin Natalia; Rivas Gonzalo Julian C; Garcia Estevez Ignacio; Heredia Francisco J; Teresa Escribano Bailon M

来源：Journal of Agricultural and Food Chemistry, 2015, 63(35): 7645-7653.

DOI：10.1021/acs.jafc.5b00181

• ternary copigmentation
• malvidin-3-glucoside
• (+)-catechin
• quercetin-3-beta-D-glucoside
• differential colorimetly

The combined effect of anthocyanin-flavanol-flavonol ternary interactions on the colorimetric and chemical stability of malvidin-3-glucoside has been studied. Model solutions with fixed malvidin-3-glucoside/(+)-catechin ratio (MC) and variable quercetin-3-beta-D-glucoside concentration (MC+Q) and solutions with fixed malvidin-3-glucoside/quercetin-3-beta-D-glucoside ratio (MQ) and variable (+)-catechin concentration (MQ+C) were tested at levels closer to those existing in wines. Color variations during storage were evaluated by differential colorimetry. Changes in the anthocyanin concentration were monitored by HPLC-DAD. CIELAB color-difference formulas were demonstrated to be of practical interest to assess the stronger and more stable interaction of quercetin-3-beta-D-glucoside with MC binary mixture than (+)-catechin with MQ mixture. The results imply that MC+Q ternary solutions kept their intensity and bluish tonalities for a longer time in comparison to MQ+C solutions. The stability of malvidin-3-glucoside improves when the concentration of quercetin-3-beta-D-glucoside increases in MC+Q mixtures, whereas the addition of (+)-catechin in MQ+C mixtures resulted in an opposite effect.

• 出版日期2015-9-9